Skiving-machine.



W. A. PARMENTBR a A; B. ALBEN.

SKIVING MACHINE.

APPLIOATIQN :11.13B D20. 9, 190s.

Patented Dec. 2l, 1909.

Cit

WILLIAM A. PARMENTER AND ARTHUR B. ALBEN, OF BROCKTON, lVIASSACI-IUSETTS, ASSGNORS F N'E-THIR) 'lO CHARLES S. PIERCE, OF ERCKTON, MASSACHUSETTS SKIVING-MACHINE.

ricerca.

Application filed December it" la 9, 190'. Serial No. 486,632..

To all idiom, it lmay concern:

Be it known that we7 lllimaaat A. lani .unx'ri-Jn and irrntiii B. ALDEN, citizens ot the United States, residing at Brockton,

county of Plymouth, State ot Massaclnr' se'tts, have invented a certain new and use- 't'ul Improvement in Skiving-lilachines, of which the followingT is a speeitication, reterence lacing` had therein to the accoinpanynig drawings,

Our invention has for its object an improvement. in machines einployed for thinningthe edges of pieces of leather7 such -for instance as are employed in hookhinding and in the manufacture of boots and shoes.

The invention relates particularly to ma chines of the kind in which a cylindrical knife is employed, hat. the n'iachine embodying,Y our invention is so constructed that it will do all the kinds of work which have heretofore heen done on machines employing a rotating disk knite, known as Amano/en machines, as well as the. work heretot'oro done on machines ot the type ei'nployinjg a cyliinlrical knife, aud in addition thereto certain work which it has not been possible to do ou either of these kinds ot' machines. such for instance as skivingI the throat of the vamp of the hoot or shoe. Ileretoforel` so tar as is known to us, it has heen impossible to .skire the throat of the ramp owing to the 'tact that the guide which assists in presenting the work to the knife interferes with the leather when the leather is swung around to present the curved portion of the work to the knife, and this results in cutting or notehing' the edge ol.E the leather. The machine. embodying our present invention will do the various kinds of work heretofore done hy imichines oi' the two kinds referred to, and 'in addition thereto. will also skive the throat. ol1 the VampsI without injury tol the stock.

Our invention also particularlyadapted to do the ordinary work of a skiving niachinc more rapidly than machines heretolore employed so t'ar as is known to us, particularly hy reason ot` the-tact that the work may hc turned in any direction desired by the operator without striking the support 'for the Vfeed Lguide. and also heeause the work is iled through the machine from front to back instead of from side to side. asyhas heretofore heen the case. The arrangement makes it possible for the operator to guide the work with greater accuracey while at tra: same time working;` with greater speed. So far as is known to us this has not been herei totorc possible in the machines ofthe type employinga cylindrical kni'le.

The invention will he fully understood trom the 'following description taken in connection with the accompanying dra wings and the novel features will be pointed out and t clearly delined in the claims at the close ot the Specilieation.

In the drawings,Figure l is afront elevation oi" a machine embodying our invention. lfig. 2 is a"top plan View of the working parts shown in llig. l.. Fig. 3 is a view in perspective ot' the bracket with the said guide roller removed. Fig. 4 is a section ot' the iced wheel taken on line d l Fig. 2.

Dreferring to the dra wings,-at. A indicated the' traine oli the .machine which is ol.t any conf'enient shape and form. 'ln the said lrame is located the cylindrical knife B mounted on the shalt C and driven by means not shown. 'lhe knit'e l is surrounded hy a housing or casing l), which is preferably formed integral with the traine ot' the niacliine, and which serres to protect the operator troni the 'edge ol the knife. The top of said housing is tlattcned as shown at E which together with the shell F forms a support Ltor the work as ity is guided to the rotatingknife. The work is presented to the kni'te by means of a knurled leed wheel G and a rotatingfeed guide ll which. eooperate with each other, the `tormer heilig -located above and thelatter helow the point at; which the cutting; operation performed.

The lecd wheel Gr is supported partially within the cylindrical kuil'e B upon one arm l of a rorkshatt el which is pivotcd to the 'traine of the machine. 'l'he other ar'in ol" the said rockshaft J extends do\'.'n\\'ardly and carries at its lower end al thumb-screw K the cud ol which strikes against the :t'rame or some other tixed part. ol the machine bcing' held in contact therewith by 'means of the spring M. 1t will he .seen that a niovenient ol the thumb screw K tends to more the 4feed wheel G up and down as the caso may be. The feed wheel. G is positively driven hy means ol a crown gear lt termed on its lett-hand end surface as seen `in Fig. l, and said crown gear meshes with a gear l2 carried on a shalt, '13 in bracket il of the traine A of the machine. The lower end of rta vsaid shaft 13 is provided with a Worm .passing through the center of the cylindrical gear i 1G which meshes with the worm wheel 161 on a shaft 17 driven from a suitable source i of power not shown. The feed wheel G and the driving means therefor are lixed so far as movement from the front to'the back of the machine is concerned, although the said feed wheel G is movable slightly vertically on the rockshaft J. Adjustment of the position of the cylindrical knife B necessitated j by the wearing away of the said knife f obtained by adjusting the knife forward or back in any convenient manner.

The feed wheel G has a curved and preferably knurled surface of the shape shown plainly in elevation in Fig. 1, and the portion of the surface of the. said feed wheel which lies at the right of a vertical line knife B conforms closely to the adjacent pertion of the said cylindrical knife, and this portion of the feed wheel which lies to the right of said line is the effective portion of the feed wheel, by means of which the work is presented to the knife. By this construe tion we find that a much better quality ofv work issecured than has heretofore been the case where the effective portions of the feed wheel lie half on one side and half on the other side of said line, or in other words, where the feed wheel was arranged symmetrically with respect to said line, since in the form symmetrically arranged there is a tendency to pucker the leather if the leather is swung about the cutting point which tends te injure or even destroy stock and produce unsatisfactory work. rl`he machine constructed as herein described skives the edge of the work smoothly, even when the work is being swung around the cutting' point.

The guide roll which cooperates with the work on the upper side thereof is of a forni corresponding to the forni of the feed wheel D. n'aid` guide roll H is supported on an adjustable arm 18, pivoted at 1S), to the adjustable bracket 2O which is itself supported adj'ustably on a projection 21 on the housing D about the cylindrical knife. Said feed wheel H is adjustable vertically by means of the thumb-screw 22 which moves the sliding piece 23 vertically in ways 2st supported on the projection 21 on the housing of the machine. It is also preferably adjustable horizontally by means of the eccentric screw Q7 of well known form and the set screw Q8 and may be swung about the pivot 1S). rlhe bracket and the parts by means of which the guide roll H is supported are all below the level of the table ll with the exception of the upper end of the bracket arm 2O and the arm 18, and these parts are made as small as possible so that they will oiler little or no obstruction to the v-;wiinging movement of the work. By this construction it is possible to swinpY the work around the cuttinff I point without having it strike any of the adjacent parts. So far is known to us this has not been possible in machines of this kind. le also provide the arm 18, see par-. ticularly Fig. 3, in which the guide roll fl is supported, with a downward projection or abutment 29 which lies adjacent the edge of the roller G, and as nearly in contact with it as practical. A forward projection 30 is also provided substantially on a level with the shelf lf. These two projections 2S) and 30 on the arm 18 lie very close to the adja= cent edges of both the feed wheel D and guide roll H and elfectively prevent the thin stock from running or being drawn over the edge of the feed wheel which would result in immediate ruin of the stock. This arrangement is exceedingly' important as it prevents much loss of stock.

Any convenient grinder for thel cylindrical knife may be provided. In the drawings we have shown a grinder of the well-.known type, consisting of a disk 31 of emery, or other abrading material, adjustably located in contact with the edge of the cylindrical knife by means of the bracket 32.

` lVhat we claim is: i

1. In a skiving machine, the combination with a cylindrical knife, of a feed wheel internally disposed with relation thereto and having its effective surface at one side of a 'vertical line passed through the axis of the cylindrical knife, said side being that away from the main portion of the stock to be operated upon.

Q. ln a machine of the character described,

the combination with a cylindrical knife and a feed wheel located internally with respect thereto, of a feed guide cooperating' with said feed wheel, a support for said guide provided with a depending abutment adjacent the top side edge of the feed wheel, and

a second abutment extending horizontally at the level of the edge of the vork as it passes between the feed wheel and the feed guide.

8. in a machine of the character described, the combination with a cylindrical knife and a feed wheel located internally with respect thereto, of a fcedguide cooperating with said feed wheel, a support for Said guido provided with a depending abutment adjacentthc top .side edge of the feed wheel and a second abutment extendingy horizontally at, the level of the edge of the work as it passes between the feed wheel and the feed ruideg said second abutment flaring slightly away from said rolls.

l. ln -a machine of the character described, the combination with a cylindrical knife, of

a feed wheel internally disposed with rclation thereto, a guldc roll co'iperating with' said feed wheel to feed the work, means for supporting the said guide roll'and an abutment on said supporting' means adjacent the outside edges of both the fccd wneel and the lgnide Fell wherehl: the Sleek is prevented; frein running @ver the edge el' th leed' wheel.

ln :t nniehine nl' the elnnnetei desei'ihc d. f the ennlhinzltimt with i1 el\lindii :1l l nil"e nf n leed wheel internnlliY deposed with relng tion therein.y :i guide l'nll eniipernting with z snidfeed wheel t0 vfeed the wollt, :ind nlenns l `ltn snplmi'ting the #nid guide mllnnd swingl iney it in thel plane of the axes of .Quid feed t wheel und said guide l'nll, siid snppnl'tingl lnezim heilig provided lwith nn nlnxtn'lent nd jneent'. the outside edge of the feed wheeli whei'eh)r the stoel; is prevented tioln running' i met' the edge 0l the feed wheel.

In :i nmehine 0f the elnnnetei described, the cf 1i1hiimti0n with :i cylindrical knife, of n feed wheel internally disposed with relu- I tien thereto und lniving :i eenezived end Fin'- l'uee. n j fnide i'ell eniiieiwiting with Suid-feed wheel tu l`eed the wtn'k. menus l'in' Support'- iiie'tlie :ddgnidei'nll:nnlmingingjit inthe plnne nl' the :i\'efnl' nid l'eed wheel :ind smid guide will, ywid Hippeiting' ineunn being' piee vided with nn :ihntinenl enipei'zlting with smid ennenved end nll'uee of Suid 'l'eed wheel, whei'elnv they l teel is prevented limn innning oll' the edge nl' the feed wheel.

In wit ie- `\\'he1'ent` we have hereunto Set oni' handsy und in the presence olf two witnesses.

lYILLld, A.. llLRMEN'lER. ARTHUR l5. LDEN. Wit newest:

(llamen l'. Duin, Amen H. MonnisoN. 

